Bicycle-seat clamp



(No Model.)

B. S. SEAMAN.

, BICYCLE SEAT CLAMP. No. 605,518. Patented June 14, 1898.-

' llN1TEn STATES PATENT OFFICE;

BENJAMIN s. sEAMAN, OF oANroN, 01110.

BICYCLE-SEAT CLAM P.

SPECIFICATION forming part of Letters Iatent No. 605,518, dated June 14,1898.

I Application filed October 14, 1897. Serial No. 655,115. (No model.)

citizen of the United States, and a resident of the city of Canton,county of Stark, State of Ohio, have invented a new and usefulImprovement in Bicycle-Seat Clamps, of which the following is afull,clear, and exact descrip tion, reference being had to the accompanyin gdrawings, inaking part of this specification.

My invention relates to improvements in clamps for bicycle-seatsupports; and it consists of certain features of construction andcombination of parts by which the springs of the seat-supports aresecurely held in engagement with the clamping-head at points eitherabove or below the line of the post, as will be hereinafter more fullydescribed and claimed.

In the accompanying drawings similar let-, ters of reference refer tosimilar parts.

Figure 1 is a front view of the clampinghead,showin g the relation ofthe various parts to each other. Fig. 2 is a side view showing theclamping-head, the post, and the seat-supporting springs. Fig. 3 is aperspective View of theclamping-head. Figs. land 5 are per spectiveviews of the clamping-bits. Figs. 6 and 7 are perspective views of thewashers. Figs. 8 and 9 are perspective views of the binding-nuts. r

A represents the circular post of a bicycle, upon which there is mountedthe clampinghead B, provided with laterally-projecting prongs b b,screw-threaded at their ends and having out therethrough slots 19 and 12through which are passed the clamping-bits C and O. The clamping-bitsare substantially U-shaped and have upon their upper endsoutwardly-projecting groove portions 0 c to engage with and bite againstthe post A. The lower outer surface is slightly curved and provided witha groove 0 to receive the seatsupporting springs D and D' upon eitherside of. the clamping-head. Washers E and E, I

having upon their inner surface groovese and e to engage the springs Dand Djwhich pass through the slotted apertures 17 and b in theclamping-head B, are held in engagement thereon by neans of thebinding-nuts F and F.

In operation the clamping-bits C and C are passed through the slottedapertures 19 and b in the clamping-head B. The springs D and D of theseat-support are then passed through the apertures heretofore referredto. The washers are slipped on so that the grooves e and e" thereonengage and pass over the springs of theseat-support, and the bindingnutsF and F are then screwed onto the screwthreaded prongs b and b. Theclampinghead 13 is then placed in position upon the post A, and thebinding-nuts being tightly screwed up the outwardly-projecting grooveportions 0 and a of the clamping-bits G and (1 engage with the post A.Springs D and D of the seat-support are engaged between the curvedgrooves c on the clamping-bits and the curved grooves e and e upon thewashers E and'E, securely binding the various parts to each other and tothe post.

Having thus fully described my invention, what I desire to secure andclaim by Letters Patent is 1. A clamping-block for bicycle-seatsupports, consisting of a clamping-head provided withlaterally-depending screw-threaded prongs having slotted aperturestherein, clamping-bits adapted to pass through said slotted aperturesand provided with outwardly-projecting grooved portions to engage thepost on either side of the head, and curved grooved inner edges toreceive the springs of the seat-support, washers provided with groovesupon their inner surfaces to engage said springs, and screw-threadedbindingnuts to engageuthe prongs of the clampinghead, substantially asdescribed and for the purpose set forth.

2. The combination in a bicycle-seat support, of a cIamping headprovided with screwthreaded laterally-projecting prongs having slottedapertures therein, with clamping-bits adapted to pass through saidslotted apertures and provided with outwardly-projecting groovedportions to engage the post on both sides of the head and binding-nuts,substantially as described and for ,theipurpose set forth.

In testimony whereof I have hereunto set my hand this 30th day ofSeptember, A. D.

